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AN1258

Download Application Note
Title
Title
Op Amp Precision Design: PCB Layout Techniques
Name
Name
AN1258
Date
Date
06/24/2015
Description
Description
This application note covers Printed Circuit Board (PCB) effects encountered in high (DC) precision op amp circuits. It provides techniques for improving the performance, giving more flexibility in solving a given design problem. It demonstrates one important factor necessary to convert a good schematic into a working precision design. This material is for engineers that design slow precision circuits, including those with op amps. It is aimed at those engineers with little experience in this kind of design, but can also help experienced engineers that are looking for alternate solutions to a design problem. The information in this application note can be applied to all precision (DC) analog designs, with some thought and diligence. The focus is on common op amp circuits so that the reader can quickly convert this material into improvements on their own op amp designs. Additional material at the end of the application note includes references to the literature and the schematic of a PCB used in the design example.

Development Tools

Title Part Number Title
MCP651EV-VOS
MCP651 INPUT OFFSET EVALUATION BOARD
 MCP651EV-VOS MCP651EV-VOS MCP651 INPUT OFFSET EVALUATION BOARD

Silicon Products

Title Product Title
MCP6N16
Zero-Drift Instrumentation Amplifier
 MCP6N16 Zero-Drift Instrumentation Amplifier
MCP6V84
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V84 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP6V81U
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V81U 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP6V69
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V69 80 µA, 1 MHz Zero-Drift Op Amps
MCP6486U
10 MHz Op Amp with EMI Filtering
 MCP6486U 10 MHz Op Amp with EMI Filtering
MCP655
50 MHz, 200 µV Op Amps with mCal
 MCP655 50 MHz, 200 µV Op Amps with mCal
MCP6006R
1 MHz Op Amp with EMI Filtering
 MCP6006R 1 MHz Op Amp with EMI Filtering
MCP6V14
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V14 7.5 µA, 80 kHz Zero-Drift Op Amps
TC7650
Chopper Stabilized Operational Amplifier
 TC7650 Chopper Stabilized Operational Amplifier
MCP6V74
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V74 170 µA, 2 MHz Zero-Drift Op Amps
MCP6479
3 MHz Op Amp with EMI Filtering
 MCP6479 3 MHz Op Amp with EMI Filtering
MCP6V79
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V79 170 µA, 2 MHz Zero-Drift Op Amps
MCP6496
30 MHz Op Amp with EMI Filtering
 MCP6496 30 MHz Op Amp with EMI Filtering
MCP6V76U
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V76U 170 µA, 2 MHz Zero-Drift Op Amps
MCP6C02
Zero-Drift, High-Side Current Sense Amplifier
 MCP6C02 Zero-Drift, High-Side Current Sense Amplifier
MCP6496R
30 MHz Op Amp with EMI Filtering
 MCP6496R 30 MHz Op Amp with EMI Filtering
MCP6476U
3 MHz Op Amp with EMI Filtering
 MCP6476U 3 MHz Op Amp with EMI Filtering
MCP6V11U
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V11U 7.5 µA, 80 kHz Zero-Drift Op Amps
MCP6V39
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V39 23 µA, 300 kHz Zero-Drift Op Amps
MCP6486R
10 MHz Op Amp with EMI Filtering
 MCP6486R 10 MHz Op Amp with EMI Filtering
MCP6V31U
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V31U 23 µA, 300 kHz Zero-Drift Op Amps
MCP6006U
1 MHz Op Amp with EMI Filtering
 MCP6006U 1 MHz Op Amp with EMI Filtering
MCP6V36U
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V36U 23 µA, 300 kHz Zero-Drift Op Amps
MCP6V71U
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V71U 170 µA, 2 MHz Zero-Drift Op Amps
MCP6D11
Low-Noise, 90 MHz Differential I/O Amplifier
 MCP6D11 Low-Noise, 90 MHz Differential I/O Amplifier
MCP6V16U
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V16U 7.5 µA, 80 kHz Zero-Drift Op Amps
MCP6V61U
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V61U 80 µA, 1 MHz Zero-Drift Op Amps
MCP6V89
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V89 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP6V99
10 MHz, 1.1 mA, Zero-Drift Op Amps
 MCP6V99 10 MHz, 1.1 mA, Zero-Drift Op Amps
MCP6V96U
10 MHz, 1.1 mA, Zero-Drift Op Amps
 MCP6V96U 10 MHz, 1.1 mA, Zero-Drift Op Amps
MCP6V66U
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V66U 80 µA, 1 MHz Zero-Drift Op Amps
MCP6V91U
10 MHz, Zero-Drift Op Amps
 MCP6V91U 10 MHz, Zero-Drift Op Amps
MCP6C04
Zero-Drift, High-Side Current Sense Amplifier
 MCP6C04 Zero-Drift, High-Side Current Sense Amplifier
MCP6V64
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V64 80 µA, 1 MHz Zero-Drift Op Amps
MCP6486
10 MHz Op Amp with EMI Filtering
 MCP6486 10 MHz Op Amp with EMI Filtering
MCP6V34
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V34 23 µA, 300 kHz Zero-Drift Op Amps
MCP6V97
10 MHz, 1.1 mA, Zero-Drift Op Amps
 MCP6V97 10 MHz, 1.1 mA, Zero-Drift Op Amps
MCP6V62
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V62 80 µA, 1 MHz Zero-Drift Op Amps
MCP6V82
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V82 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP6V17
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V17 7.5 µA, 80 kHz Zero-Drift Op Amps
MCP6V02
300 µA, Auto-Zeroed Op Amps
 MCP6V02 300 µA, Auto-Zeroed Op Amps
MCP6V28
620 µA, 2 MHz Auto-Zeroed Op Amps
 MCP6V28 620 µA, 2 MHz Auto-Zeroed Op Amps
MCP6V36
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V36 23 µA, 300 kHz Zero-Drift Op Amps
MCP6V61
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V61 80 µA, 1 MHz Zero-Drift Op Amps
MCP6487
10 MHz Op Amp with EMI Filtering
 MCP6487 10 MHz Op Amp with EMI Filtering
MCP6007
1 MHz Op Amp with EMI Filtering
 MCP6007 1 MHz Op Amp with EMI Filtering
MCP60713
10 MHz Precision Op Amp with EMI Filtering and Shutdown
 MCP60713 10 MHz Precision Op Amp with EMI Filtering and Shutdown
MCP6V37
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V37 23 µA, 300 kHz Zero-Drift Op Amps
MCP60711
10 MHz Precision Op Amp with EMI Filtering
 MCP60711 10 MHz Precision Op Amp with EMI Filtering
MCP663
60 MHz, 32 V/µs Rail-to-Rail Output Op Amp
 MCP663 60 MHz, 32 V/µs Rail-to-Rail Output Op Amp
MCP6V26
620 µA, 2 MHz Auto-Zeroed Op Amps
 MCP6V26 620 µA, 2 MHz Auto-Zeroed Op Amps
MCP6V66
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V66 80 µA, 1 MHz Zero-Drift Op Amps
MCP653
50 MHz, 200 µV Op Amps with mCal
 MCP653 50 MHz, 200 µV Op Amps with mCal
MCP6476
3 MHz Op Amp with EMI Filtering
 MCP6476 3 MHz Op Amp with EMI Filtering
MCP6009
1 MHz Op Amp with EMI Filtering
 MCP6009 1 MHz Op Amp with EMI Filtering
MCP6V94
10 MHz, Zero-Drift Op Amps
 MCP6V94 10 MHz, Zero-Drift Op Amps
TC7652
400 kHz, Single Zero-Drift Op Amp
 TC7652 400 kHz, Single Zero-Drift Op Amp
MCP6V86U
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V86U 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP6V54
45V, 2 MHz Zero-Drift Op Amp w/ EMI Filtering
 MCP6V54 45V, 2 MHz Zero-Drift Op Amp w/ EMI Filtering
MCP6V19
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V19 7.5 µA, 80 kHz Zero-Drift Op Amps
MCP6476R
3 MHz Op Amp with EMI Filtering
 MCP6476R 3 MHz Op Amp with EMI Filtering
MCP6489
10 MHz Op Amp with EMI Filtering
 MCP6489 10 MHz Op Amp with EMI Filtering
MCP6V72
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V72 170 µA, 2 MHz Zero-Drift Op Amps
MCP6V87
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V87 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP6V12
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V12 7.5 µA, 80 kHz Zero-Drift Op Amps
MCP6V67
80 µA, 1 MHz Zero-Drift Op Amps
 MCP6V67 80 µA, 1 MHz Zero-Drift Op Amps
MCP6V81
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V81 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP6V91
10 MHz, Zero-Drift Op Amps
 MCP6V91 10 MHz, Zero-Drift Op Amps
MCP6V71
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V71 170 µA, 2 MHz Zero-Drift Op Amps
MCP6V01
300 µA, Auto-Zeroed Op Amps
 MCP6V01 300 µA, Auto-Zeroed Op Amps
MCP6V06
300 µA, Auto-Zeroed Op Amps
 MCP6V06 300 µA, Auto-Zeroed Op Amps
MCP6V07
300 µA, Auto-Zeroed Op Amps
 MCP6V07 300 µA, Auto-Zeroed Op Amps
MCP6V03
300 µA, Auto-Zeroed Op Amps
 MCP6V03 300 µA, Auto-Zeroed Op Amps
MCP6V08
300 µA, Auto-Zeroed Op Amps
 MCP6V08 300 µA, Auto-Zeroed Op Amps
MCP661
60 MHz, 32 V/µs Rail-to-Rail Output Op Amp
 MCP661 60 MHz, 32 V/µs Rail-to-Rail Output Op Amp
MCP662
60 MHz, 32 V/µs Rail-to-Rail Output Op Amp
 MCP662 60 MHz, 32 V/µs Rail-to-Rail Output Op Amp
MCP6N11
500 kHz, 800 µA Instrumentation Amplifier
 MCP6N11 500 kHz, 800 µA Instrumentation Amplifier
MCP6V11
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V11 7.5 µA, 80 kHz Zero-Drift Op Amps
MCP6496U
30 MHz Op Amp with EMI Filtering
 MCP6496U 30 MHz Op Amp with EMI Filtering
MCP6V27
620 µA, 2 MHz Auto-Zeroed Op Amps
 MCP6V27 620 µA, 2 MHz Auto-Zeroed Op Amps
MCP6499
30 MHz Op Amp with EMI Filtering
 MCP6499 30 MHz Op Amp with EMI Filtering
MCP6V77
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V77 170 µA, 2 MHz Zero-Drift Op Amps
MCP6V32
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V32 23 µA, 300 kHz Zero-Drift Op Amps
MCP6V76
170 µA, 2 MHz Zero-Drift Op Amps
 MCP6V76 170 µA, 2 MHz Zero-Drift Op Amps
MCP6V92
10 MHz, Zero-Drift Op Amps
 MCP6V92 10 MHz, Zero-Drift Op Amps
MCP6V96
10 MHz, 1.1 mA, Zero-Drift Op Amps
 MCP6V96 10 MHz, 1.1 mA, Zero-Drift Op Amps
MCP6V86
5 MHz, 0.5 mA, Zero-Drift Op Amps
 MCP6V86 5 MHz, 0.5 mA, Zero-Drift Op Amps
MCP651
50 MHz, 200 µV Op Amps with mCal
 MCP651 50 MHz, 200 µV Op Amps with mCal
MCP652
50 MHz, 200 µV Op Amps with mCal
 MCP652 50 MHz, 200 µV Op Amps with mCal
MCP6V52
45V, 2 MHz Zero-Drift Op Amp w/ EMI Filtering
 MCP6V52 45V, 2 MHz Zero-Drift Op Amp w/ EMI Filtering
MCP6V31
23 µA, 300 kHz Zero-Drift Op Amps
 MCP6V31 23 µA, 300 kHz Zero-Drift Op Amps
MCP6V16
7.5 µA, 80 kHz Zero-Drift Op Amps
 MCP6V16 7.5 µA, 80 kHz Zero-Drift Op Amps
MCP6V51
45V, 2 MHz Zero-Drift Op Amp w/ EMI Filtering
 MCP6V51 45V, 2 MHz Zero-Drift Op Amp w/ EMI Filtering
MCP60711U
10 MHz Precision Op Amp with EMI Filtering
 MCP60711U 10 MHz Precision Op Amp with EMI Filtering
MCP60811
25 MHz Precision Op Amp with EMI Filtering
 MCP60811 25 MHz Precision Op Amp with EMI Filtering
MCP60813
25 MHz Precision Op Amp with EMI Filtering and Shutdown
 MCP60813 25 MHz Precision Op Amp with EMI Filtering and Shutdown
MCP6497
30 MHz Op Amp with EMI Filtering
 MCP6497 30 MHz Op Amp with EMI Filtering
MCP60811U
25 MHz Precision Op Amp with EMI Filtering
 MCP60811U 25 MHz Precision Op Amp with EMI Filtering
MCP6006
1 MHz Op Amp with EMI Filtering
 MCP6006 1 MHz Op Amp with EMI Filtering
MCP6477
3 MHz Op Amp with EMI Filtering
 MCP6477 3 MHz Op Amp with EMI Filtering
MCP60723
10 MHz Precision Op Amp with EMI Filtering and Shutdown
 MCP60723 10 MHz Precision Op Amp with EMI Filtering and Shutdown
MCP60721
10 MHz Precision Op Amp with EMI Filtering
 MCP60721 10 MHz Precision Op Amp with EMI Filtering
MCP60721U
10 MHz Precision Op Amp with EMI Filtering
 MCP60721U 10 MHz Precision Op Amp with EMI Filtering
MCP6C26
Zero-Drift, 36V Current Sense Amplifier
 MCP6C26 Zero-Drift, 36V Current Sense Amplifier
MCP60821
25 MHz Precision Op Amp with EMI Filtering
 MCP60821 25 MHz Precision Op Amp with EMI Filtering
MCP60823
25 MHz Precision Op Amp with EMI Filtering and Shutdown
 MCP60823 25 MHz Precision Op Amp with EMI Filtering and Shutdown
MCP60821U
25 MHz Precision Op Amp with EMI Filtering
 MCP60821U 25 MHz Precision Op Amp with EMI Filtering